The adaptive mesh refinement （AMR） method is applied in the 2-D Euler multi-component elasticplastic hydrodynamics code （MEPH2Y）. It is applied on detonation. Firstly, the AMR method is described, including a cons...The adaptive mesh refinement （AMR） method is applied in the 2-D Euler multi-component elasticplastic hydrodynamics code （MEPH2Y）. It is applied on detonation. Firstly, the AMR method is described, including a conservative spatial interpolation, the time integration methodology with the adapitve time increment and an adaptive computational region method. The advantage of AMR technique is exhibited by numerical examples, including the 1-D C-J detonation and the 2-D implosion ignited from a single point. Results show that AMR can promote the computational efficiency, keeping the accuracy in interesting regions.展开更多
The paper presents a finite volume numerical method universally applicable for solving both linear and nonlinear aeroacoustics problems on arbitrary unstructured meshes. It is based on the vertexcentered multi-paramet...The paper presents a finite volume numerical method universally applicable for solving both linear and nonlinear aeroacoustics problems on arbitrary unstructured meshes. It is based on the vertexcentered multi-parameter scheme offering up to the 6th accuracy order achieved on the Cartesian meshes. An adaptive dissipation is added for the numerical treatment of possible discontinuities. The scheme properties are studied on a series of test cases, its efficiency is demonstrated at simulating the noise suppression in resonance-type liners.展开更多
研究基于Euler网格的有限体积法(Finite volume method,FVM)模拟三维大变形非稳态铝型材挤压过程的基本理论和关键技术,应用C语言编制程序求解速度场、温度场等物理场量,并利用运动界面追踪技术——流体体积(Volume of fluid,VOF)方法...研究基于Euler网格的有限体积法(Finite volume method,FVM)模拟三维大变形非稳态铝型材挤压过程的基本理论和关键技术,应用C语言编制程序求解速度场、温度场等物理场量,并利用运动界面追踪技术——流体体积(Volume of fluid,VOF)方法捕捉材料流动前沿。采用“移动的网格”处理计算区域边界的移动问题,实现对真实物理过程的数值模拟,并将模拟结果与比较成熟的商品化有限元软件DEFORM-3D的模拟结果进行对比,表明所建立的有限体积法模拟模型有效、可靠。结果对比表明,FVM模型的模拟结果更符合实际,证明有限体积法比有限元法更适合大变形挤压过程模拟。展开更多
基金Sponsored by the National Natural Science Foundation of China(10676120)Laboratory of Computational Physics Foundation(9140C690101070C69)
文摘The adaptive mesh refinement （AMR） method is applied in the 2-D Euler multi-component elasticplastic hydrodynamics code （MEPH2Y）. It is applied on detonation. Firstly, the AMR method is described, including a conservative spatial interpolation, the time integration methodology with the adapitve time increment and an adaptive computational region method. The advantage of AMR technique is exhibited by numerical examples, including the 1-D C-J detonation and the 2-D implosion ignited from a single point. Results show that AMR can promote the computational efficiency, keeping the accuracy in interesting regions.
基金Russian Foundation of Basic Research(No. 04-01-08034, 06-01-00293-a)
文摘The paper presents a finite volume numerical method universally applicable for solving both linear and nonlinear aeroacoustics problems on arbitrary unstructured meshes. It is based on the vertexcentered multi-parameter scheme offering up to the 6th accuracy order achieved on the Cartesian meshes. An adaptive dissipation is added for the numerical treatment of possible discontinuities. The scheme properties are studied on a series of test cases, its efficiency is demonstrated at simulating the noise suppression in resonance-type liners.
文摘研究基于Euler网格的有限体积法(Finite volume method,FVM)模拟三维大变形非稳态铝型材挤压过程的基本理论和关键技术,应用C语言编制程序求解速度场、温度场等物理场量,并利用运动界面追踪技术——流体体积(Volume of fluid,VOF)方法捕捉材料流动前沿。采用“移动的网格”处理计算区域边界的移动问题,实现对真实物理过程的数值模拟,并将模拟结果与比较成熟的商品化有限元软件DEFORM-3D的模拟结果进行对比,表明所建立的有限体积法模拟模型有效、可靠。结果对比表明,FVM模型的模拟结果更符合实际,证明有限体积法比有限元法更适合大变形挤压过程模拟。
